The official Meteor Client does not natively support ; it is designed exclusively for the Fabric mod loader. For Minecraft 1.20.1, you have two primary options: the standard (and recommended) Fabric installation or an experimental workaround to run it on Forge using a compatibility layer. Option 1: Standard Installation (Recommended)
Note: This is experimental and may cause stability issues depending on other mods installed. Option 2: The Pure Fabric Route (Recommended) meteor client forge 1201
Download the Sinytra Connector mod and its required API (Forgified Fabric API) and place them in your mods folder. The official Meteor Client does not natively support